<script>
	var a = eval('('+
	'{aa:[{aaa:1,aab:2,aac:3}]}'
	+')');
	//eval('var a = 2');
	//eval('alert("1")');
	//var a = {"aa":[{aaa:1,aab:2,aac:3}]};
	//var a = {aa:alert(1)};
	alert(a.aa[0].aaa);
</script>